Transient photoluminescence enhancement as a probe of the structure of impurity-trapped excitons in CaF2:Yb2+

M.F. Reid, P.S. Senanayake, J.P.R. Wells, G. Berden, A. Meijerink, A.J. Salkeld, C.K. Duan, R.J. Reeves

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

We demonstrate a direct measurement of the energy levels of impurity-trapped excitons in CaF2:Yb2+. The radically different radiative decay rates of the lowest exciton state and higher excited states enable the generation of a transient photoluminescence enhancement measured via a two-step excitation process. We observe sharp transitions arising from changes of state of localized electrons, broad bands associated with changes of state of delocalized electrons, and broad bands arising from trap liberation.
Original languageEnglish
Pages (from-to)113110/1-113110/4
Number of pages4
JournalPhysical review. B, Condensed matter and materials physics
Volume84
Issue number11
DOIs
Publication statusPublished - 2011

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